Improvement in devices for extracting



' H. HARRIS.

Improvement in Devices for Extracting Broken Tools from Oil-Weils.

N0.129,66l I PatentedJulyZB, 1872.

UNITED STATES.

PATENT OFFICE.

HART HARRIS, OF TIDIOUTE, PENNSYLVANIA.

IMPROVEMENT IN DEVICES FOR EXTRACTING BROKEN TOOLS FROM OiL-WELLS.

Specification forming part of Letters Patent No. 129,661, dated July 23,1872.

SPECIFICATION.

I, HART HARRIS, of Tidioute, in the county of Warren and State ofPennsylvania, have invented an Improved Extracting-Tool for Oil- Wellsand ArtesianWells, of which the following is a specification:

My invention relates to the construction of a special tool for thewithdrawal of the jars or links used in the drilling or boring ofoilwells, when these jars are broken and lost in thebore of the well, orfor therecovery and withdrawal of similar broken tools,which are apt torest against the sides of the bore, and which cannot well be caught by atubular grapplingtool. It consists of a tool having a body cylindricalat its lower end, and thence tapering slightly to its upper end, formedwith a solid center or core, and with lateral grooves wide enough anddeep enough to receive the tool to be recovered, in which are fittedelastic wickers or jaws connected at their upper ends through atransverse slot in the upper ends of the grooves,theheads of the wickersor jaws being confined in inclined seats or recesses until sprung by thebroken tool or piece to be caught thereby.

In the accompanying drawing, Figure l is an elevation of my improvedextracting-tool, illustrating it when it has taken hold of a broken rodto withdraw it; and Fig. 2, a longitudinal section of the tool in linea; w of Fig. 1, illustrating the jaws when entirely released.

A is the body of the tool, technically termed a socket. It is made witha cylindrical base of a diameter to fit the bore of the well, and taperssmaller upwardly, as illustrated in the drawing. The center of thissocket is left solid, as shown at a, Fig. 2, but it is deeply groovedlongitudinally on opposite sides, as shown at b b, to receive the end ofthe'rod, f jar, or other tool broken off and left in the bore, and whichit is desired to remove. The upper ends of these grooves are connectedby a transverse slot, 0. B B are elastic wickers or reins playing one ineach of the grooves b b, and connected together at their upper endsthrough the slot 0, as shown in Fig. 2. The lower ends of these wickersare armed with serrated griping-jaws d d, so turned as that their facesshall be parallel to a diamet ric plane taken through the socket andtheir edges outward. The rear face of each jaw is inclined or madewedge-shaped, and acorrespondingly wedge-shaped or inclined recess, t,is formed in the side of each groove, as shown in Figs. 1 and 2, toreceive it. A seat is formed in the upper end of the slot 0 to receivethe upper end of a spiral spring, f, inserted therein to bear upon theupper end of the wickers when these last are elevated and set to engagethe tool to be extracted. The wickers are so proportioned in length asthat when elevated so that their jaws shall fit back into the recesses41 z their upper ends shall compress the spiral spring f closely intoits seat. The recesses t t are of such depth as that when the jaws arefitted back therein the grooves or elongated recesses 11 b will be leftclear and open to their full width at that point. The slot 0 is of suchlength as that when the wickers and jaws are released the latter willpass down below the end of the socket, as shown in Fig. 2.

The upper end of the socket is threaded, as shown in the drawing, forconnection with the working and driving rods in the usual manner.

In using this tool, the wickers are forced up (compressing the spring f)until the jaws d d slip back into the recesses 13 i, when they aresecured in place by inserting small blocks or wedges of wood betweeneither jaw and the opposite face of the groove or elongated recess 1),in which it plays. After being thus set the tool is lowered into thebore of the well until it strikes the broken jar or other piece to beextracted. It is then driven down thereon until the piece, passing intoone groove or the other, will loosen and displace the block confiningthe jaws, which, under the operation of the spring f, will be forceddownward, and because of their inclined faces be forced inward upon thepiece, clamping it tightly, as illustrated in Fig. 1. If now it be founddesirable to free the socket, the jaws may, by continued blows upon thesocket, be gradually forced down below its lower end, as shown in Fig.2, and thus be entirely released from the object which was graspedthereby.

I claim as my invention- 1. A socket or extracting-tool, constructed, asherein described, with a solid center and with longitudinal grooves orwicker seats formed in the sides thereof, substantially as and for thepurpose herein set forth.

2. In combination with the subject-matter of the preceding claim andwith a slotted aperture in said socket, the connected wickers B B,Working in the longitudinal grooves 11 b of the socket, substantially asand for the purpose herein set forth.

HART HARRIS. Witnesses MATT MCDERMOTT, W. F. LE ROY.

